Cloverly, Morrison, and Sundance Formations (WYKJs;0)

Cloverly, Morrison, and Sundance Formations

Cloverly Formation - Rusty sandstone at top, underlain by brightly variegated bentonitic claystone; chert-pebble conglomerate locally at base. Morrison Formation - Dully variegated claystone, nodular limestone, and gray silty sandstone. In southern Yellowstone and Jackson Hole areas the presence of Morrison is questionable. Sundance Formation (Js) - Greenish-gray glauconitic sandstone and shale, underlain by red and gray nonglauconitic sandstone and shale.

State	Wyoming
Name	Cloverly, Morrison, and Sundance Formations
Geologic age	Middle Jurassic-Lower Cretaceous
Lithologic constituents	Major Sedimentary > Carbonate > Limestone Sedimentary > Clastic > Mudstone > Claystone Sedimentary > Clastic > Sandstone Minor Sedimentary > Clastic > Mudstone > Shale Sedimentary > Clastic > Conglomerate Incidental Sedimentary > Chemical > Chert Sedimentary > Clastic > Mudstone > Claystone > Bentonite
References	Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000. https://pubs.er.usgs.gov/publication/70046739
NGMDB product	NGMDB product page for 16366
Counties	Albany - Carbon - Converse - Fremont - Johnson - Laramie - Natrona - Park - Platte - Washakie

Cloverly, Morrison, and Sundance Formations

Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000.